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David White Theodolite

David White Theodolite

Description

This 9-inch theodolite was made for the U. S. Coast and Geodetic Survey, and designed for first order triangulation. It dates from the mid-1930s. New, it cost $2,175. It is marked "David White Co. Milwaukee Wis. No. 9049" and "USC&GS No. G362." The horizontal circle is graduated to degrees, and read by opposite micrometers with drum dials to 30 seconds. The vertical circle is graduated to 10 minutes, and read by opposite verniers and magnifiers to single minutes. The David White Co. was established in 1895, and renamed the David White Instrument Co. in 1956.